campbell and lu lingzi, a chinese graduate student at boston university. last night, neighbors and friends of martin richard and his family held a candlelight vigil near a baseball diamond and field where he used to play. >> everybody knows them, everybody loves them. it's just unthinkable, you know, anybody's little boy, was our little boy. >> reporter: boston common was the site of another vigil last night. several hundred turned out to sing and pay tribute to those killed, and the more than 170 injured. >> bostonians and people who are here are resilient and we come together in the hardest times and the best times so you know it's still great to be a bostonian. >> reporter: and in washington today, secretary of state john kerry, who also calls boston home, spoke emotionally at a congressional hearing. >> the granddaughter of a very, very close supporter and friend of mine through all my political career is fighting to keep both of her legs. boston is not going to be intimidated by this. but we're going to find out who did this. >> reporter: many of the